Home / 39,282.94-54,209.70-21,378.34

Finding the Fourth Proportional to 39,282.94, 54,209.70 and 21,378.34

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Solution

The fourth proportional to 39,282.94, 54,209.70 and 21,378.34 is: 29,501.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,282.94 : 54,209.70 = 21,378.34 : x
  2. Step 2: Convert to fraction form
    39,282.94/54,209.70 = 21,378.34/x
  3. Step 3: Cross multiply
    39,282.94x = 54,209.70 × 21,378.34
  4. Step 4: Simplify right side
    39,282.94x = 1,158,913,397.90
  5. Step 5: Solve for x
    x = 1,158,913,397.90/39,282.94
  6. Step 6: Final answer
    x = 29,501.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.